Valve mechanism.



#40,629,821 Patented hugs l, 1899;

Y A jsHELBuRNE. VALVE ME'GHAMISILl applicati@ mea Mar. 2s, 1399.) :UluModel.)

UNITED STATES..

@PATENT Genion.

AUGUSTINE SHELBRNE,.OFNEW LQNDON, MISSOURI.

VALVE MEcHANlsu/i.

SPECIFICATION forming part of Letters Patent No. 629,822, dated August1, 189e, Application nea naar te, 189e. serai No. 710.758. on moan.)

To all whom it mrtg/concern: u

Be it known that I, AUGUSTINE SHELBURNE, a citizen of the United vStatesof America, residing at New London, in the county of Rails and State ofMissouri, have invented certain new and useful Improvements inSteam-Oylinders and Valve Mechanism, of which the following is aspecification, reference being had therein to the accompanying drawing.

rlhis invention relates to cylinders for steam-engines; and it has forits object to provide novel mechanism whereby the expenf sivesteam-chest now in use is discarded and a less complicated structure issubstituted.

A further object of the invention is to provide a steam-cylinder inwhichthe steam is admitted to either end of the cylinder through portswhich are opened and closed by reason of the contact of the piston withtappets projecting into the cylinder th rough the heads at the front andback.

A further object of the invention is the provision of novel meanswhereby the mechanism which operates to open the steam-port at one endcauses the port of the exhaust-pipe at the opposite end to register withthe interior of the cylinder, and vice versa.

Finally, the object of. the invention is to provide a steam-cylinder andvalve mechanism which will be strong and durable, efficient andsatisfactory in use, while at the same time it will prove comparativelyinexpensive to produce and sustain.

With the above and other objects in view the invention consists in thenovel details of construction and in the arrange ment and combination ofparts to be hereinafter more full y Set forth in the annexed claims.

In describing the invention in detail reif-V erence will be had to theaccompanying drawing, forming part of this specification, wherein likecharacters denote corresponding parts and in which the figure is alongitudinal vertical sectional view of a cylinder and controllingmeans' embodying the invention.

In the drawing, 1 denotes the cylinder, 2 the irontA head, and 3 thelback head. The top of the cylinder at each end is iitted with branch"steam-pipes 4 il, which are connected 5o with the main steam-pipe 5,leading to the steam-generator.

The cylinder is provided with shoulders 6 Vin order to shift the valvesand ports.

just below the lower end of the steam-pipes, which act as stops to limitthe throw of the slide-valves 7 7. The valves for closing thesteam-ports are produced by having the upper surfaces of theexhaust-pipes arranged to fit closelyagainst the shoulders 6 as saidexhaust-pipes are shifted longitudinally of the cylinder.

Exhaust-ports 8 8, one each in the lower surface of the closed end oftheexhaust-pipe, are sealed by the heads of the cylinder alternately-thatis, when the steamsport is open at one end the exhaust-port at that endis sealed by being drawn into and embraced by the Acylinder-head andwhen the steam-port is open and the exhaust-port is closed or sealed atoneend the steam-port is closed and the exhaust-port is open at theopposite end.

The exhaust-pipes have on their extremities tappets 9,Y which projectinto the cylinder andagainst which the piston alternately abuts Themanner in which this is accomplished will be seen from the drawing andthe foregoing description. A

The exhaust-pipe heretofore described has its end l0 embraced by astationary extension, it being understood that a packing-box isprovidedV to prevent escape and leakage. Packin g-boxes are alsoprovided for the piston-rod 11'and for the cylinder-heads at 12 12 forobvious reasons. Brackets 13 project upwardly from the cylinder forsupporting the exhaustpipe and are provided with apertures through whichthe upper portion of the-eXhaust-pipe is slidable.

The reverse-lever 14: and reach-rod 15 are provided, said reach-rodbeing connected with the triangular plate v16 of the housing 17, thesaid housing being so formed as to incase the exhaust-pipe, supports,dsc. Springs 1S eX- ert a pressure on the reverse-lever in oppositedirections, so that it is normally in "a vertical position. The plate 16is provided with a segmental rod 19, with springs 2O en- IOO la eaaaltages will, it is tho'ught, be understood from the foregoingdescription, and it will be noted that various changes may be made inthe proportions and other details of construction without departingfro'm the spirit of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, isL v 1. A cylinder provided withports adapted to alternately admit steam at either end thereof, valvesfor controlling the ports, saidv cylinder also being provided with anexhaustpipe having ports alternately closed by the heads of saidcylinder, and tappets actuated by the piston-head for operating thevalves, substantially as described.

2. In combination with a cylinder provided with shoulders, theexhaust-pipes, the end of exhaust-pipe acting as a slide-valve for thesteam-ports abutting the shoulders, the lower surface of theexhaust-pipes being provided with ports, which are alternately sealed bythe cylinder-heads, and tappets on the ends of the exhaust-pi pe adaptedto be alternately engaged by the piston-head, substantially asdescribed.

3. In combination with a cylinder having shoulders, a movableexhaust-pipe also formare alternately sealed by the cylinder-heads;

and tappets on the ends of the exhaust-pipe adapted to be alternatelyengaged bythe piston-head, brackets on the cylinder for supporting theexhaust-pi pe, and a stationary exhaust-pipe arranged to receive the endof the movable exhaust-pipe, substantially as described.

5. In combination with a cylinder, a movable exhaust -pipe also formingthe inletvalves whereby steam is alternately admitted and exhaustedatboth ends of said cylinder, the cylinder having shoulders, tappetsactuated' by the piston-head, steam and exhaust pipes at both ends ofsaid cylinder, and upwardly-extending brackets for supporting theexhaust-pipe, said brackets having apertures through which the upperportion of the exhaust-pipe is slidable, and means for reversing thestroke of the piston, substantially as described.

In testimony whereof I affix my signature in the presence of twowitnesses.

AUGUSTINE SHELBURNE.

Witnesses:

THOMAS WALLACE, DAVID VALLACE.

